I'm curious, b/c conceptually I like the idea of no fixed vacation, just take it when you need it. How was this handled in the company or established in the cul

I'm curious, b/c conceptually I like the idea of no fixed vacation, just take it when you need it. How was this handled in the company or established in the culture? Did the bosses do the same thing? I could imagine if the heads set the example most might follow suite.